WITH ADVANCED KEYLESS SYSTEM
Diagnostic procedure
DTC U0127 DIAGNOSTIC PROCEDURE
POSSIBLE CAUSE
terminal 3Q and the instrument cluster terminal 1N.
z
Keyless control module malfunction.
z
Instrument cluster malfunction.
z
Poor connection at connectors (female terminal)
With keyless entry system
z
Open or short circuit in the wiring harness between the keyless receiver
terminal D and the instrument cluster terminal 1N.
z
Keyless receiver malfunction.
z
Instrument cluster malfunction.
z
Poor connection at connectors (female terminal)
STEP
INSPECTION
ACTION
1
INSPECT WHEEL UNIT SIGNAL
FOR OPEN CIRCUIT
z
Turn the ignition switch off.
z
Disconnect keyless CM and
instrument cluster connectors.
z
Inspect for continuity between
keyless CM terminal 3Q
(harness-side) and instrument
cluster terminal 1N (harness-
side).
z
Is there continuity?
Yes Go to the next step.
No
Repair or replace the wiring harness for an open circuit
between keyless CM terminal 3Q and instrument
cluster terminal 1N, then go to Step 5.
2
INSPECT WHEEL UNIT SIGNAL
FOR SHORT TO POWER
z
Turn the ignition switch off.
z
Disconnect keyless CM and
instrument cluster connectors.
z
Measure the voltage between
keyless CM terminal 3Q
(harness-side) and ground.
z
Is there B+?
Yes
Repair or replace the wiring harness for a short to
power between keyless CM terminal 3Q and
instrument cluster terminal 1N, then go to Step 5.
No
Go to the next step.
INSPECT WHEEL UNIT SIGNAL
2008 Mazda CX-9 Grand Touring
2008 SUSPENSION On-Board Diagnostic (Suspension) - Mazda CX-9
Microsoft
Sunday, November 15, 2009 10:25:36 AM
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